Houseplant Problem

We can’t tell for sure in the photo but this may be the result of insufficient light. Most houseplants need bright, indirect light, regular water, and feed with a slow-release fertilizer formulated for container plants (to avoid salt build-up resulting in leaf tip and edge burn). And make sure the potting soil is well-draining. If the foliage continues to fall off, suggest you show some of the leaves and your photo to a horticulturist at your local garden center for a hands on identification of the problem. Also look for signs of insects such as aphids, mealybugs or scale. They suck the nutrients out of leaves and stems causing the leaves to fade in color, distort the foliage or cause the foliage to fall off. If so, there are systemics for houseplants to help control them.